Green branching hammer, not sure what they go for. It doesn't have a fancy name but it is a great LPS to keep! I know you didn't ask but if it's in your display, I'd let it grow. I have a colony in my frag tank that is for fragging so I never let it grow that big due to space constraints. As long as it's happy, it'll always be fragg-able if you need the space. Let it grow or don't, it was just a thought. In fact, I'm seriously considering bringing my frag colony and putting it in the display. Not a bad idea now that I think about it...